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Instaspin BLDC

chris anderson94852
Prodigy 10 points
Other Parts Discussed in Thread: DRV8301

Hi,

I'm converting a vehicle alternator into a hybrid BLDC motor so I can have adjustable field current for an e-bike (desirable for hills).

1. If I purchase the Instaspin kit, how do I attach a pot type speed control? (do I need any accessory boards/modules)

2. Will Instaspin cope with real time speed control (via hand throttle) and field current changes adequately?

Thanks.

  • 0
    TI__Guru** 119380 points

    chris

    1. The DRV8301/2 board has a pot style speed controller built onto the board. You would have to set up the sampling and then tie that value to the speed reference variable.

    2. Yes, it does this much better than other BLDC techniques. However, to really make this work properly you are going to want to have a good current loop. If you don't, BLDC techniques are known for large current spikes during dynamic situations, and these spikes can make the driver fault. It's one of the reasons that FOC techniques are often used.  Using FOC the current control is built-in, nice and smooth.  An FOC solution is included with the kit as well.